Retail keys for Company of Heroes: Opposing Fronts can be activated through Steam to access the updated version required for modern compatibility, following the closure of original servers. Physical keys from the manual or disc case are entered directly into the Steam client's "Activate a Product" feature, with digital alternatives available at third-party retailers. For a video guide on the activation process, watch this YouTube video . activating retail CoH on steam... :: Company of Heroes

The safest method is purchasing through Steam itself. Company of Heroes: Opposing Fronts is no longer sold as a standalone title on most storefronts. Instead, it is included in:

Elias didn't smile. He picked up the case. It was a relic from 2007. Company of Heroes: Opposing Fronts . A standalone expansion for a game that defined a generation of RTS players.